Supports two versions, sling and normal bikini. A correct gen should have pretty much only the nipples covered by the top and a little bit of nipple poking out. Also this model is predisposed towards larger breasts sizes and in my experience doesn't work well with smaller breasts when prompted.

Example prompts:

• ultra_micro_bikini, beach, ??, witch_hat, wink, solo, areola_slip, waving, cocktail_glass, alcohol, orange_slice,

• ultra_micro_sling, solo, areola_slip, puffy_nipples, bracelet, glasses, red_skin, jumping, volleyball_net, beach, sunlight, smug,

  https://civitai.com/models/2273944/ultra-micro-bikinislingshot-swimmsuit